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HowShorted

How shorted is CytomX Therapeutics, Inc.? CTMX

#187most shorted US stockof 3,805 ranked stocks, more shorted than 95%

17.73%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+2.35
5 reports (~10 weeks)
+1.39
days to cover
9.29
Aggregate net short position time series for CytomX Therapeutics, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for CytomX Therapeutics, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
6 Aug 202616.11% 31 Jul 202615.89% 14 Aug 2026−0.22
7 May 202613.66% 30 Apr 202614.30% 15 May 2026+0.64
16 Mar 202612.00% 13 Mar 202612.95% 31 Mar 2026+0.95
6 Nov 202516.95% 31 Oct 202517.30% 14 Nov 2025+0.35
7 Aug 202514.53% 31 Jul 202515.24% 15 Aug 2025+0.71
12 May 202512.09% 30 Apr 202521.99% 15 May 2025+9.90
6 Mar 20256.00% 28 Feb 202511.51% 14 Mar 2025+5.51
7 Nov 20247.24% 31 Oct 20245.67% 15 Nov 2024−1.57

Fails to deliver

The SEC's fails-to-deliver figure for CTMX: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
135,965
10 Sep 2026
Highest in window
349,191
18 Mar 2026
Days with a balance
71
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for CytomX Therapeutics, Inc. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 349K shares.

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Sector: Healthcare · By year: 2018 · 2019 · 2020 · 2021 · 2022 · 2023 · 2024 · 2025 · 2026

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202617.73%+2.35
31 Aug 202615.38%−0.51
14 Aug 202615.89%−0.22
31 Jul 202616.11%−2.41
15 Jul 202618.52%+2.18
30 Jun 202616.34%+2.28
15 Jun 202614.06%+0.87
29 May 202613.19%−1.11
15 May 202614.30%+0.64
30 Apr 202613.66%−2.51
15 Apr 202616.17%+3.22
31 Mar 202612.95%+0.95
13 Mar 202612.00%+0.92
27 Feb 202611.08%+1.11
13 Feb 20269.97%+1.27
30 Jan 20268.70%−0.77
15 Jan 20269.47%−4.45
31 Dec 202513.92%+4.02
15 Dec 20259.90%−0.24
28 Nov 202510.14%−7.16
14 Nov 202517.30%+0.35
31 Oct 202516.95%−0.27
15 Oct 202517.22%−1.80
30 Sep 202519.02%+1.46
15 Sep 202517.56%+1.21
29 Aug 202516.35%+1.11
15 Aug 202515.24%+0.71
31 Jul 202514.53%−15.08
15 Jul 202529.61%+1.83
30 Jun 202527.78%+1.99
13 Jun 202525.79%+2.27
30 May 202523.52%+1.53
15 May 202521.99%+9.90
30 Apr 202512.09%−0.14
15 Apr 202512.23%+0.28
31 Mar 202511.95%+0.44
14 Mar 202511.51%+5.51
28 Feb 20256.00%+0.38
14 Feb 20255.62%−0.20
31 Jan 20255.82%−0.10
15 Jan 20255.92%−0.21
31 Dec 20246.13%−0.95
13 Dec 20247.08%+1.47
29 Nov 20245.61%−0.06
15 Nov 20245.67%−1.57
31 Oct 20247.24%−0.53
15 Oct 20247.77%−0.23
30 Sep 20248.00%−0.94
13 Sep 20248.94%−0.21
30 Aug 20249.15%−0.93
15 Aug 202410.08%+0.17
31 Jul 20249.91%−1.52
15 Jul 202411.43%−0.46
28 Jun 202411.89%+0.43
14 Jun 202411.46%−0.21
31 May 202411.67%−1.25
15 May 202412.92%+7.61
30 Apr 20245.31%0.00
15 Apr 20245.31%+0.40
28 Mar 20244.91%−0.30
15 Mar 20245.21%+2.79
29 Feb 20242.42%+0.47
15 Feb 20241.95%+0.08
31 Jan 20241.87%−0.10
12 Jan 20241.97%−0.02
29 Dec 20231.99%+0.52
15 Dec 20231.47%−0.53
30 Nov 20232.00%+0.01
15 Nov 20231.99%+0.11
31 Oct 20231.88%−0.43
13 Oct 20232.31%−0.25
29 Sep 20232.56%−0.76
15 Sep 20233.32%+0.07
31 Aug 20233.25%+0.18
15 Aug 20233.07%−0.85
31 Jul 20233.92%−0.14
14 Jul 20234.06%+0.48
30 Jun 20233.58%−0.01
15 Jun 20233.59%+0.15
31 May 20233.44%+0.23
15 May 20233.21%−0.51
28 Apr 20233.72%+0.31
14 Apr 20233.41%+0.98
31 Mar 20232.43%−0.42
15 Mar 20232.85%+0.92
28 Feb 20231.93%−0.16
15 Feb 20232.09%−0.34
31 Jan 20232.43%−1.84
13 Jan 20234.27%+2.04
15 Dec 20222.23%−0.78
30 Nov 20223.01%+1.53
15 Nov 20221.48%−0.03
31 Oct 20221.51%−0.11
14 Oct 20221.62%−0.19
30 Sep 20221.81%+0.03
15 Sep 20221.78%+0.42
31 Aug 20221.36%−0.22
15 Aug 20221.58%−0.42
29 Jul 20222.00%−3.57
15 Jun 20225.57%−0.27
31 May 20225.84%−0.34
13 May 20226.18%+0.37
29 Apr 20225.81%+1.59
14 Apr 20224.22%−1.78
31 Mar 20226.00%+0.15
15 Mar 20225.85%+0.01
28 Feb 20225.84%−0.13
15 Feb 20225.97%+0.62
31 Jan 20225.35%−0.32
14 Jan 20225.67%+0.93
31 Dec 20214.74%−1.38
15 Dec 20216.12%+0.51
30 Nov 20215.61%−1.56
15 Nov 20217.17%−0.26
29 Oct 20217.43%+0.52
15 Oct 20216.91%−0.55
30 Sep 20217.46%−0.58
15 Sep 20218.04%−1.01
31 Aug 20219.05%−1.20
13 Aug 202110.25%−0.49
30 Jul 202110.74%+0.51
15 Jul 202110.23%+0.02
30 Jun 202110.21%−0.06
15 Jun 202110.27%+0.06
28 May 202110.21%−0.14
14 May 202110.35%+0.10
30 Apr 202110.25%+0.70
15 Apr 20219.55%−0.35
31 Mar 20219.90%+3.85
15 Mar 20216.05%+0.92
26 Feb 20215.13%0.00
12 Feb 20215.13%−2.74
29 Jan 20217.87%+1.35
15 Jan 20216.52%+0.25
31 Dec 20206.27%−0.23
15 Dec 20206.50%−0.62
30 Nov 20207.12%−0.81
13 Nov 20207.93%−0.62
30 Oct 20208.55%+1.19
15 Oct 20207.36%+0.72
30 Sep 20206.64%−0.51
15 Sep 20207.15%−0.46
31 Aug 20207.61%+0.42
14 Aug 20207.19%+0.21
31 Jul 20206.98%+1.17
15 Jul 20205.81%−1.10
30 Jun 20206.91%+3.24
15 Jun 20203.67%+1.06
29 May 20202.61%+0.05
15 May 20202.56%+0.23
30 Apr 20202.33%−0.41
15 Apr 20202.74%+0.84
31 Mar 20201.90%−1.22
13 Mar 20203.12%+0.32
28 Feb 20202.80%+0.26
14 Feb 20202.54%−0.34
31 Jan 20202.88%−0.51
15 Jan 20203.39%−0.03
31 Dec 20193.42%−1.70
13 Dec 20195.12%+0.55
29 Nov 20194.57%−0.19
15 Nov 20194.76%+0.42
31 Oct 20194.34%+0.51
15 Oct 20193.83%−0.20
30 Sep 20194.03%−0.55
13 Sep 20194.58%+0.58
30 Aug 20194.00%+0.12
15 Aug 20193.88%−0.01
31 Jul 20193.89%−0.14
15 Jul 20194.03%+0.34
28 Jun 20193.69%−0.40
14 Jun 20194.09%−0.11
31 May 20194.20%−0.23
15 May 20194.43%−0.63
30 Apr 20195.06%−0.39
15 Apr 20195.45%−0.06
29 Mar 20195.51%+1.30
15 Mar 20194.21%−0.32
28 Feb 20194.53%−0.87
15 Feb 20195.40%+0.17
31 Jan 20195.23%+0.33
15 Jan 20194.90%−0.40
31 Dec 20185.30%+0.12
14 Dec 20185.18%+0.26
30 Nov 20184.92%−0.63
15 Nov 20185.55%−0.29
31 Oct 20185.84%−0.16
15 Oct 20186.00%−0.20
28 Sep 20186.20%+1.17
14 Sep 20185.03%−0.35
31 Aug 20185.38%+0.03
15 Aug 20185.35%−0.24
31 Jul 20185.59%−1.41
13 Jul 20187.00%−0.29
29 Jun 20187.29%+1.97
15 Jun 20185.32%+0.79
31 May 20184.53%+0.96
15 May 20183.57%+0.89
30 Apr 20182.68%−0.02
13 Apr 20182.70%+0.04
29 Mar 20182.66%−0.43
15 Mar 20183.09%+0.22
28 Feb 20182.87%+0.26
15 Feb 20182.61%+0.19
31 Jan 20182.42%−0.60
12 Jan 20183.02%+0.03
29 Dec 20172.99%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is CytomX Therapeutics, Inc. right now?
17.73% of CytomX Therapeutics, Inc.'s (CTMX) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 187th most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this CTMX's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is CTMX's days to cover?
9.29 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.